Sr Software Developer

Interactive Brokers; Greenwich (CT); On-site; USD 100,000 - 130,000; Full time

Benefits offered by this job

Competitive salary and performance-based bonus

Retirement plan with company match

Excellent health and wellness benefits

Paid time off and parental leave

Daily lunch allowance and stocked kitchen

Education reimbursement and learning opportunities

Modern office with multi-monitor setups

Job summary

Interactive Brokers in Greenwich, CT is looking for a Java Developer to design, develop, and maintain their Web API platform. This hybrid role offers three days in the office and two days remote.

The successful candidate will be involved in adding features, writing documentation, and providing support. Strong skills in Java, RESTful services, and proficiency with Git are required. The company offers competitive salaries, bonuses, health benefits, and a collaborative work environment.

Qualifications

• Proven experience as a Java Developer with expertise in Java, Spring, and Vert.x.
• Strong command of RESTful web services and experience in designing and implementing them.
• Experience with JUnit or other testing frameworks for unit/integration tests.

Responsibilities

• Work with business and internal teams to add new features and interfaces.
• Write documentation units and regression tests for new interfaces.
• Write backend services to expose internal services.
• Provide third-level support.

Skills

Java

Spring

Vert.x

Git

RESTful web services

JUnit

WebSockets

AWS

Agile development

Education

Bachelor's or Master's degree in Computer Science or related field

Job description

Greenwich, CT, One Pickwick Plaza, Greenwich, Connecticut, United States of America

Job Description

Posted Thursday, April 23, 2026 at 10:00 AM

Company Overview

Interactive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.

IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.

Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.

This is a hybrid role (3 days in the office/2 days remote).

About your team:

The successful candidate will help design, develop, and maintain our Web API platform, which currently provides third Parties, clients, and IBKR's client-facing applications with access to highly critical, real-time services required for day-to-day operations. As a member of the Web PI team, you will help shape the platform's future and have numerous opportunities for growth.

What will be your responsibilities within IBKR:

• You will work with business and internal teams, adding new features and interfaces as required.
• You will write documentation units and regression tests for new interfaces.
• You will write backend services and/or clients that will help expose internal services.
• You will provide third-level support.

Which skills are required:

• Bachelor's or Master's degree in Computer Science or a related field.
• Proven experience as a Java Developer with expertise in Java, Spring, Vert.x
• Proficiency in using Git version control for code management and collaboration.
• Strong command of RESTful web services and experience in designing and implementing them.
• Experience with JUnit or other testing frameworks for writing unit and integration tests.
• Solid understanding of software development principles and best practices.
• Experience with WebSockets and real-time communication in a Java-based environment
• Strong problem-solving skills and the ability to work independently and within a team.
• Excellent communication skills and a collaborative mindset.
• Continuous learning and staying up-to-date with the industry
• Familiarity with cloud technologies (e.g., AWS) is a plus.
• Previous experience with agile development methodologies is a plus.

To be successful in this position, you will have the following:

• Self-motivated and able to handle tasks with minimal supervision.
• Superb analytical and problem-solving skills.
• Excellent collaboration and communication (Verbal and written) skills.
• Outstanding organizational and time management skills.

Company Benefits & Perks

• Competitive salary, annual performance-based bonus and stock grant
• Retirement plan 401(k) with competitive company match
• Excellent health and wellness benefits, including medical, dental, and vision benefits, and a company-paid medical healthcare premium.
• Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)
• Paid time off and a generous parental leave policy
• Daily company lunch allowance provided, and a fully stocked kitchen with healthy options for breakfast and snacks
• Corporate events, including team outings, dinners, volunteer activities and company sports teams
• Education reimbursement and learning opportunities
• Modern offices with multi-monitor setups